Experiment Equipment

Set in control room to take output from experimental room ethernet connection. Control laptops connected via 5GHz WiFi.

Control Laptop x3

2x remote control for sensor and sdlr, 1 for notes

Ethernet Cable x 2

To connect DAQ laptop to network in the experimental room, network hub to network in control room.

Portable Enclosure

Modified Big Zarges Waterproof Wheeled Equipment Case.

Features mount for scintillator and DSLR, front and back openings for beam, patch panel with ports for SHV, BNC, SMA, USB, Camera Link cables.
Hole for sensor powering.
Mylar windows with Al support mounted to internal face: approximately light-tight.

Scintillator stack

14 x 2 mm, 15 x 2.6 mm and 20 x 3 mm sheets in ascending order from the front/beam of the end of the scintillator. Sheet 21 not used. Sheet numbers from front to end (in beam direction): 30,29,28,27,26,22,19,18,17,15,14,13,10,7,25,24,23,20,16,12,11,9,8,6,5,4,3,2,1,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50.

In Controls/Options: Make sure "Send string with CR" is selected. Should be default.

In Controls/Setup: Select Serial Port: Enabled. Baud rate has to be 115200

Set low full well mode using W000300000

Set high full well mode using W000300004

Read full well mode using R0003

Continuous Field buffer setting

This setting makes sure that the buffer is filled with a new frame as they come in. If this option is not selected the sensor and software will not be synchronised and we *will record a lot of pitch black images.

Experiment Plan

12–13th April

Calibration of detector (highest clinical energy). Shoot from front and back of stack (we have a new entrance window at the back of the stack). Also calibrate at different focus sizes. Also test camera: focus on front of beam stack and centre of beam stack and compare.

Measure WET of known blocks of plastic to calibrate range telescope using a pencil beam with ~10cm range. Lennart will check if he can find some PMMA slabs whose WET has been accurately measured. Ideally have some slabs between ~1mm and ~5cm WET thickness. We know that there are some PMMA slabs between 1mm and 5cm thickness, measured by Giulia Arico (OMA fellow). These measurements will be used to benchmark Laurent's reconstruction code. Use tightest beam focus.

Repeat 0.-3. with all available ions (protons, helium, carbon and oxgen)

Measure SOBP of protons. 10cm deep, 3cm plateau

Measure high proton energies (up to 250MeV) using PMMA absorber in front of range telescope.

SOBP no absorber. sensor: 6 pix in the center. C/Workplaces/HIT-Exp/Seco/Lennart/20190412/he-contamination_ucl-sobp_c-2Gy_30x30x30mm3-75mm.xml Problem with the total dose a factor 10 higher than C.3mm Ripple filter always IN for SOBP

17

high

approx max 210 min 172

-

8*10^7

10.2 - 8.7

He

-

0

SOBP no absorber. sensor: 6 pix in the center. C/Workplaces/HIT-Exp/Seco/Lennart/20190412/he-contamination_ucl-sobp_c-2Gy_30x30x30mm3-75mm.xml. Too long but saved. Problem with the total dose a factor 10 higher than C. 3mm Ripple filter always IN for SOBP

18

high

approx max 210 min 172

-

8*10^7

10.2 - 8.7

He

-

0

SOBP no absorber. sensor: 6 pix in the center. C/Workplaces/HIT-Exp/Seco/Lennart/20190412/he-contamination_ucl-sobp_c-2Gy_30x30x30mm3-75mm_2Gy.xml NEW FILE *_2Gy respect to the previous. 3mm Ripple filter always IN for SOBP

19

high

220.51

-

8x10^7

4.9

He

-

0

pencil beam. no absorber. full sensor

20

low

220.51

-

8x10^7

4.9

He

-

0

pencil beam. no absorber. full sensor

21

low

219.8

-

8x10^7

4.7

C

-

0

pencil beam. no absorber. full sensor

22

high

219.8

-

8x10^7

4.7

C

-

0

pencil beam. no absorber. full sensor

23

low

approx max 210 min 172

-

8*10^7

10.2 - 8.7

He

-

0

SOBP no absorber. sensor: 6 pix in the center. C/Workplaces/HIT-Exp/Seco/Lennart/20190412/he-contamination_ucl-sobp_c-2Gy_30x30x30mm3-75mm_2Gy.xml